Can someone tell me the uses of the attached firewall steering column mounts?
Why they are different?

Different year? Auto? Manuel? Tilt? Non tilt? Etc.
Thanks

I honestly can't tell you for sure but I would say different years. I guess it could even be different assembly plants. If I can remember I will look at some of my trucks in the morning and see if I can tell.

Lockdoc, Can you tell me if they are manual or auto or tilt or is it just Year specific?

The Green '67 was an I6 with a 4 speed manual, The '67 Panel Truck was an I6 with a 3 speed manual, Not sure what the '67 C30 had for an original engine. It had a 350 and 4 speed manual in it when I bought it but the owner kept the engine/trans. The '68 has the original 327/TH400 in it. If I remember correctly the Yellow '70 originally had a 307 and 4 speed manual in it, the '71 had a 402 and Th400, and the '72 dually had a 350 and 4 speed manual..... No tilts on any of them originally.

Which would you use? I do believe the left one will have more adjustment.

Look close at your mast jacket/column housing, if it has one bump on it use one of the ones on the right, if it has two bumps on it use the one on the left. The bumps fit into the one raised area or the two cutouts on the brackets....

So this past weekend I switched my non-tilt automatic column (1972) out for a tilt automatic column (1971 or 72, not sure). My non-tilt column used the bracket on the far right, and my tilt column used the one on the far left.